Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Started as a kitchen garden, now the second largest botanical garden in the world.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.

Model Trains and Much More in Hamburg.

This sprawling Jewish cemetery is one of the largest in Europe.

The silly symbol for an underground protest group is now scattered around the city.

The most visited, and possibly most controversial, museum in Germany.

A fountain standing as a testament to a doomed alliance.

A gorgeous, Gaudí-esque stairway constructed in the city of Istanbul by a prominent Jewish family.

A quiet Sicilian village is home to a cafe that had an important role in "The Godfather."

A random tree outside a Budapest hotel has become a DIY shrine to the late singer.

The place where World War I began.

In this town's main square resides a statue of none other than the 43rd President of the United States.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

The abandoned club hides in the hills of Ibiza.

Climb a set of vertiginous stone steps to the top of this impressive ancient edifice.

One of the newest mosques in a city filled with thousands.

This crucial gathering spot along the "hippie trail" still displays old notes between traveling beatniks and backpackers.

A portable, wooden replica (minus the hyphen) of Hamburg’s iconic crooked coffee shop.

Beneath the impressive baroque cathedral that rises from the center of Berlin lies the largest collection of Prussian royals in the world.

The Cathedral of Salamanca has a number of unusual carvings but none so surprising as a modern astronaut.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.